Polishing-machine.



No. 814,787. PATENTED MAR. 13, 1906.

" J. LEH-NBBUTER.

POLISHING MACHINE. APPLICATION IIILED SEPT. a. 1905.

INVE/YTOR Jose/2h Za/m cufr' 2 'Be itknown UNITED STATES PATENT O FICE.

. JOSEPH. LEHNBEUTER, or sT Louis, MISSOURI. i i IPOLISHING-MACHINE. v

' clear, and exact'descrip'tion, referenc'ebeing haid to'the accompanying drawings, forming aparthereof'.

I in hand wood polishing machines; and it My invention has relation toimprovements consists the novel construction and combination of parts 'more fully'setforth in the specification and pointedout in the claims.

In the drawings, Figure 1' is a sideelevation of the machine. Fig; 2 is-a topplan with cover or hood removed. Fig? 3 .183, vertical longitudinal section on the line-3 3- of Figi' 2.

Fig: 4' is a sectional detail on the line 4 4 of Fig. 1," showing the locking-latch for the ad justin'g' screw" of'the fadjustable-axleof the. terminal ull'ey; and Fig. 5 is an enj larged'sectionj s owing the formation of the p 'olishin' belt.

Theo jeet of: my invention is to construct a hand tool which can be brought'to operate on and polish the surface of any piece of WOO (l' Work or other structure already in place,-dis- "pensing with the necessity "of bringing the work to-the machine, as must be done Withstationar'y polishing machinery.f- The present machine is not only portable, but light enough to be passed by hand ov'erthe surfaceto be polished or finished.

A further object is to construct a machine which will be simple, light, cheap, durablepositive and uniform in action, and one pos- .sessing further and other advantagesbetter apparent from a detailed description of the invention, which is as follows:

Referring to the drawings, F represents an oblong frame having mounted at'one end between the sides of the frame a pulley or drum 1, freely rotatable about an axle 2, whose opposite ends pass throughlongitudinally-elongated slots 3 of the sides of the frame. The purpose of the slots is to allow ment of the axle along the frame for taking up the slack of the polishing-belt, as presently will more fully appear. The 0 posite ends of the axle are controlled by t e adjustingscrews 4, whose screwthread ed portions'pass through the axle, the screws being carried by the lateral lugs 5 of the frame. To the base of each lug 5 is ivoted a gravity latch or arm 6, provided a ong its bottom edge with a Specification of Letters Patent. Application filed September 8,1905, Serial No. 277.537.

for adjust- :at'enteu iilareh 13, 1906.,

fin er 7, which drops into one of a series. of

soc ets 8, formed in the hub 9 at the base of the head 10 of the screws By turningd'he screws 4 in: proper direction the. axle 2 will be adjusted withinits slottedbearings and when once adjusted is looked in position by dropping the arm-6 to eausethe finger 7 socket S'that happens to be opposite thereto. Mountedat the opposite end of the, frame are a pair of drums or pulleys '11, separated by-a sprocket-wheel 12,-mounted onthe same aXle-therewitlythe sprocket-wheel having .a sprocket-chain13 leading therefrom over a s rocket-pinion 14, carried at the middle of tlie intermediate drive-shaft 15, mounted transversely across the frame F and parallel to the axes of rotation of the pulleys 1, and 11.-

-To thepro'jecting end of the drive-shaftl-5iis :atta'ched one end of a fleXible-shaft16,leadingto'any source of power; (Not shown.)

=Pass1ngover the respective pulleys ifsl't'he polishing-belt B, I whose detailed-f construction will presently .be 'referredto. The under lap of the belt passes over a seriesof idlersor rollers '17, mountedat the lower side edges of the frame F;

to engage the -The frame F is providedwith a cover or hood. H, which is attached. to theirame on the sides by the latehesL engagingpins 18 on the frame,-this form-of latch beingwell known and, requiring no detailedv description here i kind of locking-latch may be used. The cover is provided with a handle 19, by which the machine may be'passedby the, hand over the surface to be polished. To raise the belt especially-in view of the fact that a'nv- B off the floor when the machine is set down,

(especially should the belt be running,) I pro,-

vide the cover II at the sides with bent'levers v -2O, pivoted to the lugs 21 on the cover, the

pairs of levers at each end of the machine having their lower ends connected by rollers 22 and their free upper ends by a rod 23, (the ends of the levers loosely embracing the rod,) about which is coiled a spring "24, which normally forces the upper arms of the levers at opposite ends apart, as shown in Fig. 1, the roller ends of the levers approaching one another from opposite ends to raise the frame Fv and the belt B oil' the floor or other surface on which the machine may be resting. The raising of the belt B oil the floor prevents the machine from running away should the operator release his hold on the same. When it is desired to operate the machine, a slight pressure thereon will force the roller ends lIO apart, (see dotted position, Fig. 1,) thereby allowing the belt to come in contact with the surface to be polished.

The belt Bis preferably made of a filling of felt a, Fig. 5, havin an inner facing of buckram b and an outer acing of cotton 0, the latter having paperd. The sheet (1 may of course be v'aried according to the re uiremeflts of Work to be performed. The illing a being more or less yielding enables the belt to better conform to the unevenness of'the surfacepassed over, thus passing over the surfacewith a minimum amount of resistance. ing material (1 being disposed along a sheet or belt operates over an extended surface, which ofcourse is im ossible with machines operating with polis ng drums or rollers, whichcan contact only along a'line or very narrow strip'of surface.

In the operation of the machine the workman simply passes the belt B back and forth over the wood or surface to be polished, subjecting the same tosuflicient pressure to force the rollers 22 apart. When any particular ob is finished, the machine may be set upon the floor without any danger of its running away, since the resiliency of the springs 24 is suflicient-to tilt'the levers 20 to a position to elevate the weight of the frame off the floor. The flexible shaft 16 may, if desirable, be, kept running constantly.- By disposing the shaft -15 centrally the machine becomes veryeffectively balanced, and while I here show a noiseless drive-chain 13 it is apparent that any other form of gear mechanism may be substituted therefor without departing from the spirit of the invention. According to the character of the Work to be done the I abrading-surface (i may of. course bevaried. Having described my invention, what I claim is- 1. A hand polishing-tool comprising a suitable frame, a substantially centrally disposed at opposite ends of the frame,

pasted thereto the sheet of sand The polish-' .frame,

upon the surface to be polished, a hood for drive-shaft mounted across the frame, drums gearing between the drive-shaft and one of the drums for imparting-rotation thereto, and a polishing-belt traveling about the drums, substantially as set forth.

2. A hand polishing-tool comprising a frame, devices on the frame for operatingupon the surface to be polished, and a springcontrolled support for raising the operating parts of the machine off the surface on which it may be placed, substantially as set forth.

intermediate I 3. A hand polishing-tool comprising a devices on the frame for operating the frame, spring-controlled belt-levers at each end and rollers mounted between the lower ends of a pair of levers at each end of the hood, and

springs engaging the upper-ends of each pair g of levers on the same side of the, hood, and means for lockin the hood to the frame, substantially as set orth.

4. A hand polishin long frame, drive shaft on the frame, a central sprocketpinion on the shaft, drums or pulleys at opposite ends of the frame, means for adjusting the axis of one of the terminal drums longitudinally along encompassing the drive-shaft and passing over the drums, a detachable hood for the frame, a yielding support for the frame carried by the hood, a sprocket-wheel on the shaft of one of the terminal drums, and a drive-chain connecting said sprocket-wheel with the sprocket-pinion, substantially as set forth.

In testimony whereof I affix my signature in presence of tWo witnesses.

' JOSEPH LEHNBEUTER. Witnesses:

EMIL STAREK, MARY D. WHITCOMB.

-tool comprising an obthe frame, a polishing-belt on opposite sides of the hood, 

